Google Maps will now not only show subway riders where they can catch a train, but where they can’t.

Google announced Tuesday that it has begun publishing the Metropolitan Transportation Authority’s service advisories for the city subway system on its popular mapping site. The function — which first went live late Monday night — is designed to allow travelers to plan around scheduled maintenance and construction in the transit system.

To see service advisories, users can click on the image of any of New York’s 468 subway stations on Google Maps, the company explained in a blog post. The advisories will work on the Google Maps website and on the company’s mobile app for its Android operating system.

The advisories are a step toward more effective real-time publication of subway service information, a goal of the MTA that remains far off.

Trains in the subway’s A division — the numbered lines and the 42nd Street shuttle — are equipped with a system that enables real-time monitoring of train locations, and thus has enabled the MTA to install countdown clocks on station platforms and provide other information about where trains are running. Similar wiring has not yet been installed on the far larger B Division, delaying the roll-out of similar technology on those subway lines.